We can hardly believe that sound quality this good can fit in your coat pocket.  The ultra-portable headphone category has been virtually redefined by the extraordinary Sennheiser PX 200 II, a sealed-back on-ear headphone that not only folds into easily mobile dimensions, but sounds absolutely great for the price. It has an in-line volume control for quick access to loudness and even comes with a nifty carry pouch. A tad pricey perhaps, but worth every cent due to excellent features and comfortable wearing ergonomics.  Recommended for listeners always on the move!